{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/Recommendation",
  "title": "Recommendation",
  "type": "object",
  "properties": {
    "rec_id": {
      "type": "string",
      "description": "The recommendation model ID."
    },
    "child_ids": {
      "type": "array",
      "description": "Array of recommended item IDs.",
      "items": {
        "type": "string"
      }
    },
    "is_control": {
      "type": "boolean",
      "description": "Whether the user is in the control group for this recommendation model."
    },
    "recommendation_type": {
      "type": "string",
      "description": "The type of recommendation model."
    },
    "title": {
      "type": "string",
      "description": "The title of the recommendation."
    }
  }
}